Insulating means for bake-ovens.



C. B. COMSTOCK.

INSULATING MEANS FOR BAKE OVENS.

APPLICATION FILED 0cT.a. I9I3.

1,156,390. Patent-ed 0ct.12, 1915.

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C. B. COMSTOCKL- INSULATING MEANS FOR BAKE OVENS. APPLICATION FILED ocza. 1913.

1,156,390. Patented 060.12, 1915.

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I amar/nua "cortar B. coivis'rocK, or ivnwronir, iv. Y.

insurerine Means ron BAKE-ovens.

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To all whom it may concern:

Be it known thatl, Conny B. CoMs'roCK,

a citizen of the United' States, residing at N ew York, in the county of New York and State of New York, have invented lcertain new and useful Improvements in lnsulating Means for Bakelvens, lof which thefollowing is a specification, reference being had therein to the accompanying drawing. The principal object of the inw'fentionjis to provide an insulating `supporting means adapted to be positioned yunderneath a bake oven of any usual or preferred type and to serve to prevent the transmission of heat from the oven downward `to the floor or other support upon which the oven as a whole rests; f n N The above stated robject is attained by means of the devices which Awill be described in the following specification. y y

ln the accompanying drawings I "have shown the embodiment of my. invention which T now4 deem preferable, but it will be understood that many 4changes and modifications may bemade witliinthe scope of the lappended claims without departing from the spirit of my invention. I n n Of thel drawings- Figure 1 is a sectional i plan view. taken alongthe line 1 1 otFig.

2; Fig. 2 is a vertical sectional view taken along the line .2 2v of Fig. 1;.,Fig. 3 isj a vertical sectional view taken along the7 line,

. of Fig. SMS of Fig. 1; Figy isa vertical sar sectional lview takenV along the lineglfl-tof Fig. 1; and Fig, 5 is a vertical sectional view taken alongthe line 5+5 jofyl? ig. 1.

Referring to the drawings' 1 representsas a whole a floor upon which thebake oven is to be supported. As shown in' the' drawings the floor is formed of concrete and 1s provided withaseries oitraiisverse` andv longitudinal supporting beams integrallyV formed with the body of the floor.

The bake oven as a whole is diagrammatically indicated at 2, and as the oven can be of any usual or preferred type a detailed description of it is unnecessary. It is suiii-k cient to point out that it comprises a main central chamber 2 adapted to serve as ay combustion space, aiidtwo side nues 2b2b adapted for the passage of hot gases. The

central opening 2a extends do-wnward along a part or' its length to form the ash pit 2c.

Interposed .between the main bottom part of the furnace or oven 2iand the floor 1 is the insulating means to which my invention Patentes oet. is, reis.

l Application led October 8, 1913. Serial No. 794,142.

primarily relates. This is constructed as follows: In a layer of grouting 3 on the floor there are placed a number of parallel longitudinal rows of hollow tiles 4 arranged with their open ends communicating with each other so as to form a series of continuous ducts or passageways 5 extending longitudinally of the furnace. The ducts at the sides of the ash pit extend substantially the full length of the furnace lwhile those inthe centerterminate at one end near they rear end of the ash pit. At the rear end of the urnacethe ducts 5 terminate in a continuoustransverse passage 6 which extends the entire width of the furnace. This passage is bounded at its outer side by means of the brick wall 7 and is closed at its ends yin any suitable way.` At the other end of the furnace and at opposite sides of the ash pit are other transverse passages 8, 8: which are similar to the passage 6. They are bounded at their outer sides by the brick wall 9 and are suitably closed at their ends.r Adjacent the inner end ofthe ash pit is another transverse passage 10 similar to the passagesS, 8. Communicating with each of the passages 8,"8 and 10 are chiots 11, 11 which eX- tend downward through the iloor into theA room underneath. Communicating with the transversepassage 6 are ducts or lues 12, 12 which yextend upward and are preferably carried outward and embedded in the vertical partition wall 13. These ducts 12, l2

canezrtend` to a chimney or any other desired place of discharge. l

`Upon the tops of the hollow tiles 4 there is placed a layerle of asbestos preferably in the form yof boards `or sheets. Upon the asbestes layer 14 there arefplaced a series of hollow tiles 15 arranged with their openings extending vertically. The open spaces ,withport the furnace'or oven. p

It will be seen that when the oven is in f operation the heat which is conducted downward and given oil at the bottom is largely stopped in transmission by means of the asbestes layer 1T, and mineral wool. packing 16, and the asbestos layer 14. But even with these `several insulating means, some heat will still lind its way downward and in order to absorb lthis and itaway .provide the free ai-r spaces whichhavebeen described. It will be s'een ythat there is a continuous Apassageway for air through the ducts 11, the transversepassages 8, 8 and 10,

the longitudinal ducts 5, the transverse pas sage 6 and theV upright ducts l2, 12. f The air in the ducts 5, 5. will absorb heatV trans'- i Y permitting reshwcool air mitted downward 'from the furnace and as this air becomes heated it will pass outward and vupward through Vthe ducts or llues 12, to enter through vthej ducts 11.' ln this way continuous currents of air are caused and the heatV is all absorbed andjcarried upward through the r ducts 12,712 instead of being permitted to pass downward through the Hoor l `into the room beneath. c Y f 'It is usual in the vconstruction of bakeries to locate the bread room directly Vunderneath the ovens and on this account it is especially desirable.V to protect the room from excess heat derived from the oven. Furthermore,

.the linsulation of the oven from Vthe other of the'building is very advantageous as, without such insulation, thev heat generally causes more orless serious cracks in the parts building walls on account of expansion.

What I claimris: v l. In a heatV insulating means Vfor bake ovens, the 'combination of a plurality of parallel horizontal 'ducts adapted to lie underneath the oven, means forming ar transverse passage connecting the ducts `at one end, other means forming a transverse passage connecting the ducts at the other end, means for admitting air to the rstsaidpassage, Y and flues for receiving air Jfrom thezsecond said passage and conducting it upward.

l '2. In a heat insulating means for bake ovens the combination of a plurality of parallel horizontal ducts adapted to lie underneath the ovenA the center ducts being shorter than thosey at the sides andall of the ducts terminating atl one end in the same transverse vertical plane, means forming a trans vverse passage connecting the rducts at the last said end, 'other means forming a Vplu vCopies of this patent may be Yobtained. for iveccentseach, by'iaddressiig liWashingtoinID'. C. f

connecting the longer sideducts,

ralityj of transverse passages respectively and the shorter center ducts, 'means for admitting airl tothe'last said passages, and flues for lreceiving ai'r trom the irst said passage and conducting it upward. v .1 Y v.

3. ln a supporting and heat insulating means for bakeV ovens, the combination of al plurality ot hollow tiles set on end and adapted to lie underneaththe oven, and a packing substance `within the openspaces of the tiles for resisting the transmission of heat. v Y

`hln -asupporting and insulating means for bake ovens, the combination of ya plurality ofhollow tiles set on end and adapted to lie Vunderneath the oven, a packing substance within the open` spaces of the tiles for resisting the, transmission of heat, a

layer of'heat vinsulating material above the tiles, anda layerV of heat insulating material below the tiles; y

5. ln a heat v'insulating means for bake ovens, the combination vof a plurality of parallel horizontal ducts adapted to lie underneath the oven, means for admitting air to each of the ducts at one' end, lues for reother'end and conducting it upward and a heat insulating means above the said ducts and interposed between themy and the oven.y A6. In a heat insulating means for bake V ceiving air yiirom'each of the ducts at the ovens, the combination of a plurality ofpari allel horizontal ducts adapted to lie underneath theV oven, means for admitting air to each of the ductsat oneend, lues for receiving airv from each of the ducts at the other end and conducting it'upward, a plurality of hollow tiles'set on end above the said ducts,` and a packing substance within lthe open spaces Vof the Ytiles for resisting the the i Commissioner of Patents, 

